PHYS_2014_Lecture_31

PHYS_2014_Lecture_31 - Fall 2010 Oklahoma State University...

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Unformatted text preview: Fall 2010 Oklahoma State University PHYS2014: Benton Lecture 31, Slide 1 Lecture 31: Review for Final Exam Final Exam on Tuesday, 14 December 2010, 12:00 - 1:50 pm The class will be divided into three groups based on their recitation TA. Each group will take the exam in a different room as shown in the table below. Based on your recitation section, please go directly to your designated room. Recitation Section TA Exam Room 1, 2, 3, 19, 20, 21, 22, 23, 24 Ayon Patra PS-141 4, 5, 6, 7, 8, 9, 16, 17, 18, Ben Grossman PS-103 10, 11, 12, 13, 14, 15, 25, 26, 27, 28, 29, 30 Razvan Stoian PS-110 Fall 2010 Oklahoma State University PHYS2014: Benton Lecture 31, Slide 2 Regarding the Final Exam: • Worth (at least) 30% of your final grade. • 6-8 homework type problems. • Otherwise same format as previous exams. • Generally speaking if we covered it in a homework problem, sample example, actual exam and/or in a lecture example, then it may be on the final exam. Review for Final Exam Fall 2010 Oklahoma State University PHYS2014: Benton Lecture 31, Slide 3 252 Cf 105 Rh 147 I Radioactive nuclei of Californium-252 can undergo a process of radioactive decay called spontaneous fission , wherein the parent nucleus breaks up into two lower mass daughter nuclei and releases 188.58 MeV (3.02 × 10-11 J) of Kinetic Energy. One such fission decay reaction leads to the creation of a Rhodium-105 nucleus and an Iodine-147 nucleus. Assuming the 252 Cf nucleus is initially at rest, find the velocities of the 105 Rh and 147 I nuclei after the spontaneous fission of the 252 Cf nucleus. 1 amu = 1.66 × 10-27 kg. Fall 2010 Oklahoma State University PHYS2014: Benton Lecture 31, Slide 4 252 Cf 105 Rh 147 I 27 25 Cf 27 25 Rh 27 25 I 11 252 1.66 10 kg 4.18 10 kg 105 1.66 10 kg 1.74 10 kg 147 1.66 10 kg 2.44 10 kg 188.58 MeV 3.02 10 J f m m m E − − − − − − − = ⋅ × = × = ⋅ × = × = ⋅ × = × = = × Rh Rh I I 2 2 Rh Rh I I I Rh I Rh 2 2 I Rh I I I Rh 1 1 2 2 1 1 2 2 f f m v m v m v m v E m v v m m m v m v E m = + + = = − − + = 2 2 2 I I I I Rh 2 I I I Rh I I I Rh 2 1 2 2 1 f f f m v m v E m m m v E m E v m m m + = + = = + momentum: energy: Fall 2010 Oklahoma State University PHYS2014: Benton Lecture 31, Slide 5 252 Cf 105 Rh 147 I 27 25 Cf 27 25 Rh 27 25 I 11 252 1.66 10 kg 4.18 10 kg 105 1.66 10 kg 1.74 10 kg 147 1.66 10 kg 2.44 10 kg 3.02 10 J f m m m E − − − − − − − = ⋅ × = × = ⋅ × = × = ⋅ × = × = × 11 7 I 25 25 I I 25 Rh 25 7 7 I Rh I 25 Rh 2 2 3.02 10 J m 1.02 10 s 2.44 10 kg 2.44 10 kg 1 1 1.74 10 kg 2.44 10 kg m m 1.02 10 1.42 10 s s 1.74 10 kg f E v m m m m v v m − − − − − − ⋅ × = = = × × × + + × × = − = − × = − × × Fall 2010 Oklahoma State University PHYS2014: Benton Lecture 31, Slide 6 For his PhD research, one of my graduate students is designing, fabricating, and testing a device called a Tissue Equivalent...
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This note was uploaded on 11/28/2011 for the course PSYCH 2014 taught by Professor Staff during the Fall '10 term at Oklahoma State.

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PHYS_2014_Lecture_31 - Fall 2010 Oklahoma State University...

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